Actually three books, set in the Liaden universe Fledgling, Saltation, and Ghost Ship, by Sharon Lee and Steve Miller. I was possibly influenced by the respect with which pilots are treated by the other characters. Again, a book with a teenage girl as the protagonist. Somewhat YA, but none the worse for that.
Baen and elsewhere

The fourth book, Dragon Ship, comes out in Sept. IIRC. It's out now as an e-Arc.